Which of the following cube-shaped objects would have the highest surface-area-to-volume ratio? A cell with a volume of
A. 10 cm3.
B. 8 cm3.
C. 3 cm3.
D. 1 cm3.
D. 1 cm3.
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The most common source(s) of infection in the central nervous system (CNS) is(are):
a. hematogenous spread. b. infections at other sites such as otitis me-dia. c. organisms gaining access because of ana-tomic defects in CNS structures. d. bacteria that are able to travel along nerves leading to the brain.
All of the following are components of nonspecific immunity EXCEPT
A. skin. B. phagocytes. C. complement. D. lysozyme. E. B cells.
The change in the chromosome depicted between the top and the bottom in the figure above represents
a(n) ____.
a. inversion b. duplication c. reciprocal translocation d. deletion e. Philadelphia chromosome
Which of the following traits is characteristic of a K-selected species?
a. adapted to rapidly changing environments b. small body size c. short generation time d. provide substantial parental care to offspring e. single reproductive event common